War has wrecked whole cities, from the sacking of Troy to the bombing of Hiroshima. And it clears forests, for fuel and to make sure that enemies are not hiding in the bush. Such destruction also decimates flora and fauna. Memorial Day honors fallen military, but war is also hell on everything from civilians to civet cats and cypress trees.

War, on occasion, can also create oases. In places where humans have retreated thanks to ongoing conflict, like the Korean Demilitarized Zone, wildlife can thrive. Because, for the environment, dealing with normal human activity can be a battle.